Battery Electrode Ceramic Barrier for Heat and Wear Protection
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Solution Overview
Problem
Lithium-ion battery manufacturing processes can cause wear and damage to electrodes due to thermal energy transfer and mechanical stress, leading to reduced product yield and increased manufacturing costs.
Innovation Solution
Incorporating a ceramic material at the boundary between the coated and uncoated foil regions of the electrodes to absorb thermal energy and provide mechanical protection, thereby reducing damage from processes like rubbing, crimping, and welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal energy transfer from the foil to the coating is reduced, then the coating is protected from damage, but the manufacturing process complexity increases
Solution Approach 1:
A ceramic barrier layer is introduced as an intermediary substance between the metal foil and the electrode coating. This ceramic material acts as a thermal insulator that mediates the thermal interaction during welding processes, preventing direct heat transfer from the foil to the coating while maintaining structural integrity and adhesion.
Solution Approach 2:
The battery electrode structure uses a composite material system consisting of metal foil substrate, ceramic barrier layer, and electrode coating. This composite structure combines the electrical conductivity of metal, the thermal insulation properties of ceramic, and the functional properties of the electrode coating to resolve the contradiction between thermal protection and electrical performance.
2Productivity
If high-speed manufacturing processes are used, then productivity increases, but wear and damage to electrodes increases
Solution Approach 1:
The ceramic barrier layer is applied in advance to the metal foil before electrode coating and assembly. This pre-applied protective layer cushions the electrode structure against mechanical wear and thermal damage that occur during high-speed manufacturing processes such as rubbing, crimping, and welding, thereby maintaining electrode quality while enabling increased productivity.
3Strength
If adhesion between coating and foil is enhanced, then electrode strength improves, but thermal energy transfer to the coating increases
Solution Approach 1:
The ceramic barrier layer serves as a thermal intermediary that decouples the adhesion function from thermal conduction. The coating maintains strong adhesion to the foil through the ceramic layer, which has low thermal conductivity, thereby achieving both strong bonding and thermal protection simultaneously.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The ceramic material reduces thermal energy transfer and enhances adhesion, minimizing wear and damage, increasing product yield and enabling high-speed manufacturing processes, thus lowering manufacturing costs.
Implementation Method 1
a ceramic material that is disposed at the boundary of the coating and the electrode member (uncoated portion of the foil), such as may be in contact with the coating, may be configured to absorb at least some thermal energy from the foil and may prevent or mitigate transfer of at least some of the thermal energy to the interface between the foil and the coating and/or the coating itself
Implementation Method 2
The ceramic material may reduce thermal energy transfer from the foil to the coating
Data Source
AI summary
In an example, a battery includes a metal foil. A coating is disposed on a portion of the metal foil, and an uncoated portion of the metal foil corresponds to an electrode member of the battery. The battery further includes a ceramic barrier disposed on at least a portion of a boundary between the electrode member and the coating.